4h-pyrido2,3-d1,3oxazin-4-one derivatives and their use for controlling undesirable plant growth
CA 1267414 C · Owner: Hamprecht, Gerhard · Inventors: Wuerzer, Bruno; Hamprecht, Gerhard; Varwig, Juergen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
O.Z. 0050/37263, Abstract of the Disclosure: 4H-Pyrido2,3-d1,3oxazin-4- -one derivatives of the formula, where Y is oxygen or sulfur and R is phenyl which is unsubstituted or substituted by halogen haloalkyl, halo-, alkoxy, haloalkylmercapto haloalkylsulfinyl or haloalkyl-, sulfonyl processes for their manufacture, and their use for controlling undesirable plant growth.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 3, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.